[Olsr-users] IPv6: Using link-local all-hosts multicast address ff02::1 instead of ff0e::1 with Linux?

[Joerg Pommnitz]

Hello all,
I'm trying to use ff02::1 instead of the default ff0e::1 as multicast 
address for OLSR in IPv6. Unfortunately I always get "Network is 
unreachable".
Besides the code in olsrd-0.5.3 I tried the following modifications:
1) use sendmsg instead of sendto. With sendmsg one can add a control 
message to the data and specify the interface to use for the outbound 
data. This is what ping6 uses ("ping6 ff02::1" fails while "ping6 -I 
interface ff02::1" works as expected). Unfortunately that did not work.

2) set the sin6_scope_id to the desired interface index. No joy either.

Now I'm out of ideas. The reason I'm trying to use a link local address is 
that nrlsmf routes any non link-local multicast packets and floods them 
through the MANET. This is obviously not what we want, but I can't really 
blame nrlsmf.

So, any ideas or suggestions?

-- 
Regards
       Joerg

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